Top not showing 4 cpus on 2 xeons with HT

[Richard Tector]

Artem Kuchin wrote:
> I am just wondering if it is normal.
> I have two xeon  processors with HT on each of them.
> When loading kernel says that 4 cpu's are found,
> but when i do top i can see only 0 or 2 in the C
> column. never 1 or 3. Is it normal?
>
> FreeBSD 6.2-STABLE (cvsed 1 day ago)
If I remember correctly, HT is disabled by default for security reasons 
but there should be a sysctl to enable it. I believe there is also a 
paper by Colin Percival on the issue.

Note that in a lot of common loads, the use of HT with the standard 
scheduler does not yield any real benefits.

Regards,

Richard